fapaul commented on a change in pull request #18397:
URL: https://github.com/apache/flink/pull/18397#discussion_r789453203
##########
File path:
flink-connectors/flink-connector-kafka/src/main/java/org/apache/flink/connector/kafka/source/reader/deserializer/KafkaValueOnlyDeserializerWrapper.java
##########
@@ -62,8 +75,15 @@ public void open(DeserializationSchema.InitializationContext
context) throws Exc
deserializerClass.getName(),
Deserializer.class,
getClass().getClassLoader());
+
+ if (config.isEmpty()) {
+ return;
+ }
+
if (deserializer instanceof Configurable) {
((Configurable) deserializer).configure(config);
+ } else {
Review comment:
Currently, we have the following scenarios:
1. `De/Serializer implements Configurable` I would **only** call
`Configurable.configure`
2. Does not implement Configurable but a configuration is given call
`De/Serializer.configure`
3. No configuration is given we call `De/Serializer.configure` with an empty
map?
Probably you have to write tests for all of them although I am not fully
sure about the last. I guess calling `configure` with an empty map does not
hurt.
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